Dual role of organic matter in Feammox-driven nitrogen and phosphate removal
Feammox is a novel microbial process that enables simultaneous nitrogen and phosphorus removal in wastewater treatment. This study investigated the role of organic matter in Feammox-driven nutrient removal during long-term bioreactor operation by gradually increasing the influent chemical oxygen dem...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-05-01
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| Series: | Water Research X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589914725000118 |
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| author | Yi Liu Jiachen Dong Xiaohui Cheng Xiaotong Cen Yan Dang Kangning Xu Min Zheng |
| author_facet | Yi Liu Jiachen Dong Xiaohui Cheng Xiaotong Cen Yan Dang Kangning Xu Min Zheng |
| author_sort | Yi Liu |
| collection | DOAJ |
| description | Feammox is a novel microbial process that enables simultaneous nitrogen and phosphorus removal in wastewater treatment. This study investigated the role of organic matter in Feammox-driven nutrient removal during long-term bioreactor operation by gradually increasing the influent chemical oxygen demand (COD) concentration from 0 to 50, and then to 100 mg/L. The results revealed that the ammonium removal efficiency was reduced from 60.5 % to 20.7 % with COD concentration increasing from 0 to 100 mg/L. In contrast, organic matter enhanced nitrate removal through heterotrophic denitrification, which outcompeted nitrate-dependent Fe(II) oxidation. Phosphorus removal was increased up to approximately 90 % via Fe(II)-mediated precipitation, forming vivianite crystals, evidenced by X-ray diffraction analysis. Continuous addition of Fe(III) alleviated the inhibitory effect of organic matter on ammonia oxidation by serving as an alternative electron acceptor, reducing competition. Therefore, optimizing organic matter levels and ensuring sufficient Fe(III) availability are crucial for achieving efficient nutrient removal in Feammox systems, particularly for treating wastewater with a low carbon/nitrogen ratio. |
| format | Article |
| id | doaj-art-0e11604c0896495295987353dfa5587c |
| institution | Kabale University |
| issn | 2589-9147 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Research X |
| spelling | doaj-art-0e11604c0896495295987353dfa5587c2025-02-08T05:00:55ZengElsevierWater Research X2589-91472025-05-0127100312Dual role of organic matter in Feammox-driven nitrogen and phosphate removalYi Liu0Jiachen Dong1Xiaohui Cheng2Xiaotong Cen3Yan Dang4Kangning Xu5Min Zheng6Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, ChinaWater Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Corresponding authors.Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia; Corresponding authors.Feammox is a novel microbial process that enables simultaneous nitrogen and phosphorus removal in wastewater treatment. This study investigated the role of organic matter in Feammox-driven nutrient removal during long-term bioreactor operation by gradually increasing the influent chemical oxygen demand (COD) concentration from 0 to 50, and then to 100 mg/L. The results revealed that the ammonium removal efficiency was reduced from 60.5 % to 20.7 % with COD concentration increasing from 0 to 100 mg/L. In contrast, organic matter enhanced nitrate removal through heterotrophic denitrification, which outcompeted nitrate-dependent Fe(II) oxidation. Phosphorus removal was increased up to approximately 90 % via Fe(II)-mediated precipitation, forming vivianite crystals, evidenced by X-ray diffraction analysis. Continuous addition of Fe(III) alleviated the inhibitory effect of organic matter on ammonia oxidation by serving as an alternative electron acceptor, reducing competition. Therefore, optimizing organic matter levels and ensuring sufficient Fe(III) availability are crucial for achieving efficient nutrient removal in Feammox systems, particularly for treating wastewater with a low carbon/nitrogen ratio.http://www.sciencedirect.com/science/article/pii/S2589914725000118FeammoxAutotrophic nitrogen removalOrganic matterVivianiteIron cycle |
| spellingShingle | Yi Liu Jiachen Dong Xiaohui Cheng Xiaotong Cen Yan Dang Kangning Xu Min Zheng Dual role of organic matter in Feammox-driven nitrogen and phosphate removal Water Research X Feammox Autotrophic nitrogen removal Organic matter Vivianite Iron cycle |
| title | Dual role of organic matter in Feammox-driven nitrogen and phosphate removal |
| title_full | Dual role of organic matter in Feammox-driven nitrogen and phosphate removal |
| title_fullStr | Dual role of organic matter in Feammox-driven nitrogen and phosphate removal |
| title_full_unstemmed | Dual role of organic matter in Feammox-driven nitrogen and phosphate removal |
| title_short | Dual role of organic matter in Feammox-driven nitrogen and phosphate removal |
| title_sort | dual role of organic matter in feammox driven nitrogen and phosphate removal |
| topic | Feammox Autotrophic nitrogen removal Organic matter Vivianite Iron cycle |
| url | http://www.sciencedirect.com/science/article/pii/S2589914725000118 |
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